chore(mcp): add @rlwj-lab/opsxdb-mcp npm launcher package

Node wrapper that spawns the Go opsxdb-mcp binary (OPSXDB_MCP_BIN / PATH).
Ready for npm publish --access public (requires 2FA OTP).

packages/opsxdb-mcp/index.js

@@ -0,0 +1,16 @@
+'use strict';
+
+/**
+ * @rlwj-lab/opsxdb-mcp
+ * Node launcher for the OpsxDB Go MCP server (stdio).
+ * Prefer the `opsxdb-mcp` bin / `npx @rlwj-lab/opsxdb-mcp`.
+ */
+const {
+  resolveBinary,
+  missingBinaryMessage,
+} = require('./dist/resolve-binary.js');
+
+module.exports = {
+  resolveBinary,
+  missingBinaryMessage,
+};